Polypropylene Plastic: Recycling Code 5
Place polypropylene plastic bottles or containers (with a recycling code "5" on its underside) into your dishwasher. Because polypropylene plastic has a high melting point, it can usually withstand hot liquid.
Wash polypropylene plastic cutlery by hand or in the dishwasher.
Read the labels on polypropylene containers and cups to ensure that they're dishwasher friendly. While most of these plastic cups and containers can be washed in the dishwasher, some must be washed by hand.
Polyethylene Terephalate: Recycling Code 1
Clean empty plastic soft drink bottles for craft use or recycling. Rinse the bottle out with tap water to prevent it from becoming sticky.
Wash disposable plastic water bottles by hand and refill with water or juice. Most water bottles that fall under recycling code "1" can not withstand high heat from the dishwasher, as they're intended for single use.
Rinse mouthwash bottles and salad dressing containers to remove remnants of the previous product. Soak the bottles in a sink full of hot, soapy water. Rinse thoroughly and allow to dry prior to reuse.
Polycarbonate Plastic: Recycling Code 7
Wash large plastic resin materials by hand. If items are too large to be washed in the kitchen sink, use a wash basin or the garden hose--in combination with antibacterial dish soap.
Place smaller plastic resin objects such as food containers, in the dishwasher for a thorough cleansing.
Clean delicate polycarbonate plastic materials, such as sunglasses by hand. Use a solution of warm water and mild dish soap. Rinse thoroughly and wipe dry with a clean, soft towel.